EP 1484825 A2 20041208 - Laser diode protection circuit
Title (en)
Laser diode protection circuit
Title (de)
Schutzschaltung für einen Diodenlaser
Title (fr)
Circuit de protection pour une diode laser
Publication
Application
Priority
KR 20030035274 A 20030602
Abstract (en)
A circuit for protecting a laser diode from an initial instantaneous surge current includes an upper voltage limiter (100) for applying a predetermined voltage to a laser diode (D1) and limiting the voltage not to exceed a predetermined level and further features a low-speed voltage increaser (200) for slowly increasing a voltage to be applied to the upper voltage limiter (100) by a predetermined time constant. For ATC (automatic temperature control), the laser diode protection circuit may further comprise a lower voltage limiter (300), a low-speed voltage reducer (400) and a second leakage current breaker (450). <IMAGE>
IPC 1-7
IPC 8 full level
H01S 3/00 (2006.01); H01S 5/04 (2006.01); H01S 5/068 (2006.01); H02H 9/00 (2006.01); H02H 9/04 (2006.01); H01S 5/022 (2006.01); H01S 5/042 (2006.01); H01S 5/0683 (2006.01)
CPC (source: EP KR US)
H01S 3/00 (2013.01 - KR); H01S 5/06825 (2013.01 - EP US); H01S 5/02208 (2013.01 - EP US); H01S 5/042 (2013.01 - EP US); H01S 5/0683 (2013.01 - EP US); H01S 5/06837 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1484825 A2 20041208; EP 1484825 A3 20050525; CN 1574522 A 20050202; JP 2004363597 A 20041224; KR 20040103289 A 20041208; US 2004240133 A1 20041202
DOCDB simple family (application)
EP 04009128 A 20040416; CN 200310120448 A 20031215; JP 2004160495 A 20040531; KR 20030035274 A 20030602; US 68309003 A 20031010